天津聚源钢铁022-26801886耐大气腐蚀桥梁板钢化学成分（质量分数）/%
|
牌号 |
C |
Si |
Mn |
Nb |
V |
Ti |
Cr |
Ni |
Cu |
N |
Al |
Mo |
|
Q345qNH |
≤0.11 |
0.15-0.5 |
1.1-1.5 |
0.01-0.1 |
0.01-0.1 |
0.006-0.03 |
0.4-0.7 |
0.3-0.4 |
0.25-0.5 |
≤0.008 |
0.015-0.05 |
≤0.1 |
|
Q370qNH |
≤0.15 |
|||||||||||
|
Q420qNH |
≤0.2 |
|||||||||||
|
Q460qNH |
||||||||||||
|
Q500qNH |
0.45-0.7 |
0.3-.045 |
0.25-0.55 |
≤0.25 |
||||||||
|
Q550qNH |